Quantcast REMOVAL - TM-5-4210-224-14-P0519

 

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CRANKSHAFT AND MAIN BEARING MAINTENANCE.
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TM-5-4210-224-14-P 250 6PM Mini-Pumper Firefighting Truck Model No.:CM-KFT-3 Manual
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INSTALLATION - TM-5-4210-224-14-P0520
TM 5-4210-224-14&P
6-17. CRANKSHAFT AND MAIN BEARING MAINTENANCE. (Continued)
NOTE
Measure  dimensions  of  main
REMOVAL
bearing journals and crankpins with
a micrometer for: out-of-round, 0.
CAUTION
0002 inch (.  005 mm) maximum
Check the main bearing caps for
for both the main journal and
location markings. Mark the parts
crankpin; taper, 0.  0002 inch (.
if necessary.  The main bearing
005 mm) maximum for both the
caps must be returned to their
main
journal
and
crankpin;
original  location  at  time  of
undersize, diameter dimension of
assembly.
#1,2,3,4 main journal is 2. 94988
inches (74.  917 mm) 2.  95043
a. Remove the main bearing caps.
inches (74.  941 mm), #5 main
journal is 2.  94929 inches (74.
b. Remove lower main bearing inserts from the
912 mm) 2.  95024 inches (74.
main bearing caps.
936 mm); diameter dimension of
crankpin is 2.  39815 inches (60.
c. Remove crankshaft oil seal (paragraph 6-15).
913 mm) 2.  39917 inches (60.
939 mm).
Replace if out of
d. Remove upper main bearing inserts by inserting
specification.
main bearing remover into the crankshaft
journal oil hose and rotating the crankshaft,
c. Check the crankpins and main bearing journals
turning the bearing insert out of the block.
for scoring nicks or damage caused by lack of
lubrication. Replace if necessary.
e. Remove the crankshaft.
INSTALLATION
INSPECTION
a.
Check upper and lower half of beiar s for
ng
a. Install the crankshaft.
damage or wear.  .  If damage is evident,
replace. bearing.
b. Install the upper main bearing inserts by inserting
b.
Check crankshaft for damage, cracks, scoring
the main bearing installer into a crankshaft
and excessive wear.  If damage is evident
journal main bearing oil hole.
replace crankshaft.
6-27

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